Ep 10. From Dancing Mice to Psychopaths

As the fourth season of Orphan Black comes to a close, the tension has never been higher. In the finale episode named "From Dancing Mice to Psychopaths," fans finally get to see who will come out on top in this battle for power and freedom.

The episode opens with Sarah Manning (Tatiana Maslany) feeling defeated and vulnerable after a run-in with a dangerous new clone. Meanwhile, Rachel Duncan (also played by Maslany) is poised to take over the Neolution project and solidify her power as the ultimate clone.

As the two women square off, the rest of the clones are left to decide where their loyalties lie. Alison Hendrix (Maslany) and her husband Donnie (Kristian Bruun) are trying to save their marriage while also battling against the corrupt police force that has been giving them trouble all season. Cosima Niehaus (Maslany) is still trying to find a cure for her illness while also dealing with her complicated feelings for her ex-girlfriend Delphine (Évelyne Brochu).

As the episode progresses, the stakes get higher and higher. Sarah enlists the help of some old acquaintances to try and take down Rachel once and for all, but she's not the only one plotting. Topside has a mole in the clones' organization, and it looks like they're getting ready to strike.

Despite all the chaos and danger, there are still moments of levity and humor in the episode. Alison and Donnie's scenes provide a welcome relief from the tension, and there are some funny moments between Sarah and her sidekick Felix (Jordan Gavaris) as well.

But make no mistake, "From Dancing Mice to Psychopaths" is a nail-biting episode that will leave fans on the edge of their seats. The performances are top-notch, with Maslany once again proving why she's one of the best actresses on TV right now.

Overall, the season 4 finale of Orphan Black is a satisfying conclusion to an intense and thrilling season. Fans will undoubtedly be left wanting more, but they can rest easy knowing that the show has cemented its status as one of the best sci-fi series in recent memory.